KR101697530B1 - A head module for 3D printer comprising polygon mirrors rotating in single direction with a function of controlling energy density of beam, and a scanning method therewith and a 3D printer therewith - Google Patents

Abstract

The present invention relates to a head device for a three-dimensional molding apparatus, and to a method for scanning a molding plane (10) using the same. The head device for a three-dimensional molding apparatus has polygon mirrors rotating in a single direction, and can conduct biaxial scanning at a high speed by using the combination of the polygon mirrors. Also, the head device for a three-dimensional molding apparatus can easily control the timing and location of emitting a beam, and has an effect of increasing the precision of molding. The head device for a three-dimensional molding apparatus comprises: a molding beam source part (15) which generates a molding beam; a first light guiding part (20) which has a function of primarily reflecting a molding beam received from the molding beam source part (15) to a second light guiding part (30), and including a prescribed number of light reflection surfaces and polygon mirrors; a second light guiding part (30) which has a function of secondarily reflecting the molding beam received from the first light guiding part (20) to a molding plane (10), and including a prescribed number of light reflection surfaces and polygon mirrors; and a control part (40) which interlocks and controls the operation of the molding beam, the first light guiding part (20) and the second light guiding part (30).

Description

Technical Field [0001] The present invention relates to a head device of a stereolithography equipment having a polygon mirror rotating in one direction and having a function of controlling energy density of molding light, a method of scanning a molding plane using the same, and a stereoscopic molding apparatus using the same. in a single direction with a function of controlling energy density of beam, and a scanning method therewith and a 3D printer therewith}

The present invention relates to a head device of a stereolithography equipment having a function of controlling the energy density of shaping light rays and a shaping plane scanning method using the same. More particularly, the present invention relates to a heading device for shaping a polygon mirror, Axis scanning can be performed at a high speed and the energy density can be uniformly distributed to all points of the shaping plane regardless of the optical path or incidence angle difference by controlling the beam spot of the shaping beam or the size of the effective beam spot The present invention provides a head device of a stereolithography equipment capable of enhancing the quality of molding, and a shaping plane scanning method using the same.

3D printing is one of the methods of manufacturing products. Since it uses a lamination method, the loss of material is smaller than that of conventional cutting, and relatively low manufacturing cost is required. In recent years, technology in this field has been recognized as a next generation production technology beyond prototype production. It is possible to increase the speed of production, increase the completeness of output (resolution), diversify usable materials, This is because accessibility has improved. There are various schemes of 3D printing such as SLA (Stereo Lithography Apparatus), SLS (Selective Laser Sintering) and FDM (Fused Deposition Modeling).

US Patent No. 08605761 discloses a multi-beam laser control system and method, which comprises a laser transmitter for emitting light energy in a piece of radiation, a sensor for sensing a target, A second sensor configured to measure the intensity of the received light in the sensor of the target, and a controller that adjusts the direction of the laser transmission device to match the target, wherein the intensity of the laser beam and the number of irradiations are adjusted, An apparatus having the feature of controlling the amount of absorption is disclosed.

US 08605761 B

In the prior art 1, a separate sensor is used to measure the intensity of the laser beam and the number of irradiations to control the amount of laser absorption of the target. Therefore, the sensor 1 and the wiring for processing signals input from the plurality of sensors There is a second problem that the cost increases due to the first problem that the product layout becomes complicated due to the additional installation, the addition of the additional optical elements such as the sensor for relatively high cost components, .

According to an aspect of the present invention, there is provided a light source device including a shaping light source unit for generating shaping light rays, a shaping light source unit provided at a predetermined position above the shaping plane, A polygon mirror that has a function of first reflecting the light beam and making the light incident on the second light guide portion 30 and having a predetermined number of light reflecting surfaces and rotating in one direction about a predetermined rotation axis, A first light guide part 20 provided at a predetermined position above the shaping plane 10 and secondarily reflecting a shaped light beam incident on the rotor of the first light guide part 20, And a polygon mirror that has a function of making the light incident on the light guide plate 10 and has a predetermined number of light reflecting surfaces and rotating in a unidirection about a predetermined rotation axis, 30), the molding And a control unit (40) for controlling the driving of the first light guide unit (20) and the second light guide unit (30) in association with each other, wherein the shaping light source unit comprises a variable output Wherein the control unit minimizes the influence of the shape and size distortion of the beam spot according to the irradiation position on the shaping plane of the shaping beam so that the energy density of the shaping beam is uniform for all the irradiation positions on the shaping plane The head device of the stereoscopic shaping equipment having the function of controlling the energy density of the shaping beam is provided.

When the first polygon mirror 21 rotates in one direction and the shaping light source unit 15 starts to enter the shaping light beam into the first polygon mirror 21 and the first polygon mirror 21 reaches a predetermined The first polygon mirror 21 reflects the first shapely reflected light to the second polygon mirror 31 while the second polygon mirror 31 reflects the second shapely light beam to the second shaping plane 10, 2 and after the shaping light source unit 15 is turned off and the line scan is completed and then stepping is performed in the direction of the first axis 1 by a predetermined interval The second polygon mirror 31 is rotated by a predetermined angular displacement so that the first polygon mirror 21 is adjacent to the immediately preceding reflection surface and the rear reflection surface is adjacent to the predetermined reflection surface Until the position of the shaping plane 10 reaches the position, and until the irradiation of the shaping beam is finished with respect to the entire surface of the shaping plane 10, And then repeating the above steps.

The present invention also provides a stereolithography apparatus including the head device of the stereolithography equipment of the present invention, which supplies molding materials to form and laminate a molding layer to form a stereolithography molding.

The present invention adopts a polygon mirror that rotates in a single direction and makes the polygon mirror continue to rotate without stopping so that the shaping beam irradiation can be performed at a high speed and in controlling the irradiation position of the shaping beam, (Or effective beam spot) of the shaping light beam by the control unit to the head device capable of reducing vibration and noise generated from the head device by performing control through control of the rotational angular velocity and rotational angular displacement of the shaping light beam The first effect is that the quality of the shaping resolution shaping layer can be improved with respect to a predetermined resolution by uniformizing the shaping energy density irrespective of the portion where the shaping light beam is incident. By this control, , And the second shaping speed can be increased. Further, the present invention can be applied to various types of stereolithography devices including SLA or SLS.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view for explaining problems encountered when using a molded light source having a single output / current. FIG.
2 is an explanatory view showing a configuration of an embodiment of a head device of a stereolithography equipment according to the present invention.
3 is a perspective view showing an embodiment (1-1 arrangement) of a method of scanning a shaping plane using a head device of a stereolithography equipment according to the present invention.
4 is a perspective view showing an embodiment (a 2-1 arrangement) of a method of scanning a shaping plane using a head device of a stereolithography equipment according to the present invention.
5 is a perspective view showing an embodiment (arrangement 2-2) of a method of scanning a shaping plane using a head device of a stereolithography equipment according to the present invention.
6 is a perspective view showing an embodiment (1-2 arrangement) of a method of scanning a shaping plane using a head device of a stereolithography equipment according to the present invention.
7 is a perspective view showing one embodiment of the head device and first optical sensor 41 of the stereolithography equipment of the present invention.
8 is a perspective view showing one embodiment of the head device of the stereolithography equipment and the second optical sensor 42 and the third optical sensor 43 of the present invention.
FIG. 9 is a diagram showing an example of a method of scanning the shaping plane 10 using the head device of the stereolithography equipment according to the present invention, in which the first polygon mirror 21 is moved in the forward direction And a procedure for making a reverse rotation.
10 is an explanatory view showing an embodiment of a control method by a drive current of a molded light source included in the molded light source unit of the present invention.
11 is an explanatory view showing an embodiment of a control method for uniformizing the shaping light energy density along the incidence point of the shaping light of the present invention.

A head device of a stereolithography equipment according to the present invention comprises a shaping light source part (15) for generating shaping light rays, a first light guide part (20) for first reflecting the shaping light beam to enter the second light guide part (30) A first light guide section (20) having a function of secondly reflecting the shaped light beam incident on the rotor and making it enter the shaping plane (10), a second light guide section (30) And a control unit 40 that controls the driving of the light guide unit 20 and the second light guide unit 30 in conjunction with each other as main components and irradiates a shaping light beam with a predetermined scanning pattern over the entire surface of the shaping plane 10. [ doing Function. A schematic diagram of such a configuration is shown in Fig.

Hereinafter, related terms will be defined before describing the present invention in such a manner as to describe main components and embodiments.

The shaping plane 10 also means a region irradiated with shaping light rays whose path is controlled in the head device of the stereolithography equipment of the present invention. In order to mathematically represent the irradiation region of such actual shaping light rays, Means a logical area including a first axis 1 and a second axis 2 for describing a position on the plane as a coordinate value along the first axis 1 and the second axis 2 It is also said. The actual shaping plane 10 may be exposed directly to the exterior or may be blocked by a transparent member through which the shaping beam can transmit, even though the shaping beam can not be directly irradiated. The molding plane 10 is referred to as an effective molding region in that energy is imparted to the molding ray to actually cause the action such as photo-curing or sintering hardening to occur in the molding plane 10 region It will be possible.

The first axis 1, the second axis 2 and the third axis 3 are used to describe the scanning direction of the shaping beam to the shaping plane 10 to be described later and the positional relationship of the pattern or polygon mirror rotation axis. do. The third axis 3 is an axis perpendicular to both the first axis 1 and the second axis 2. The first axis 1 and the second axis 2 are arbitrarily located on the actual shaping plane 10.

Hereinafter, the part related to the size control of the beam spot or the effective beam spot (which will be described later), which is a technical feature of the present invention, will be described first, and then to the remaining components of the head device of the present invention I will explain.

1, in the case of applying the shaping light source unit having a constant current / constant output light source, the shape of the irradiation region (beam spot) formed on the shaping plane by the shaping light beam depending on the position on the shaping plane irradiated with the shaping light beam And the size of the beam spot varies. That is, as shown in Fig. 1 (b), the difference in light path length required to reach each point of the shaping plane 10 or the difference in incidence angle of the shaping light beam It is necessary to correct for differences in the shaping light energy density. Specifically, when the shaping light beam is incident perpendicular to the shaping plane 10, the incidence area is minimized, so that the shaping light energy density becomes large. On the contrary, when the shaping light beam has an oblique angle with respect to the shaping plane 10 The incidence area becomes large, so that the molding light energy density becomes small. However, since the degree of the action of curing-photo-curing or powder sintering of molding light on the molding material is proportional to the size of the molding light energy density, uniform molding light energy density is ensured for the entire area of the molding surface 10 Thus, in order to secure the quality of the shaping layer, it is necessary to control the shaping beam. In particular, when the head device of the present invention is enlarged, the difference in the optical path length required for the shaping beam to reach each point of the shaping plane 10 will become larger, so correction for this will become more important.

Further, referring to FIG. 1, when a shaping light source unit including a constant current / constant output light source is applied, the shaping resolution is adversely affected. When the constant current or the constant output value of the shaping light source section is set to be sufficiently large, the area of the beam spot formed in the beam spot formed in the shaping plane Likewise, since the size of the effective beam spot of the C portion (which is a part of the interior of the beam spot of the C portion) becomes larger than the size of the effective beam spot of the A portion (which is a part of the interior of the beam spot of the A portion) Unless otherwise controlled, the formative resolutions of portions A, B, and C will each be different, which is a factor of quality deterioration of the molding.

In order to solve this problem, in the present invention, as shown in FIG. 10, the shaping light source unit of the present invention applies a power control capable of adjusting the output. Preferably, the driving current can be adjusted, so that the output size can be adjusted accordingly. In this case, the driving current and the output magnitude can be configured to have an arbitrary function relationship, such as a proportional relationship, and are not limited to particular ones. That is, the relationship between the driving current and the output magnitude shown in Fig. 10 is an example Of course. That is, the value of the output (POWER) of the shaping light beam is determined by a specific functional relationship according to the magnitude of the driving current. 10, four cases of x, a, b, and c are shown in relation to the driving current application. In each case, the case is divided according to the magnitude of the applied driving current, The magnitude of the driving current is set to be larger in order of x, a, b, and c. In particular, when a laser or the like is applied as a shaping light source, intensity profiles 16x, 16a, 16c, and 16d of shaped light beams as shown in the bottom of Fig. 10 can be obtained. In the case of the laser light, as the intensity at the irradiation center point (the distance from the irradiation center point as the center of the irradiation region formed by one irradiation ray is the largest) and the distance from the irradiation center point increases, The intensity of the rays reflects a gradual decrease.

In addition, in relation to the molding material, the value of the molding critical intensity of the molding light for performing molding by curing (in the case of a photopolymer or the like) and melting (in the case of a metal material) is important. Such molding critical strength is determined by the molding material. According to the embodiment shown in Fig. 10, in the case of x, since the intensity of the shaping light beam is lower than the shaping threshold intensity with respect to all the irradiation points of the shaping light beam, no shaping is performed on all the irradiation points. On the other hand, in the case of a, b, and c, since the intensity of the shaping light beam is larger than the shaping threshold intensity with respect to the region within a predetermined distance centering the center of gravity of irradiation, shaping actually occurs in the corresponding region. Also, the larger the maximum output value of the shaping beam, the larger the size of the zone where the shaping occurs. In this regard, the concept of an effective beam spot can be assumed. The effective beam spot generally has to be contrasted with a beam spot, which is an area formed by the boundary between the shaping beam and the shaping plane generated by irradiating the shaping beam directly on the shaping beam. That is, no shaping action occurs at all points of the beam spot. This is because, as described above, since the intensity of the shaped light beam such as a laser is further away from the irradiation center point, At the point of distance, the intensity of the shaping beam is smaller than the value of the shaping critical intensity. Therefore, the boundary where the intensity of the shaping light beam has a value equal to or greater than the shaping threshold strength is important, and this boundary determines the area called the effective beam spot. In an embodiment shown in FIG. 10, the sizes of effective beam spots are shown for each of x, a, b, and c. In the case of X, a beam spot was formed, but no effective beam spot appeared. On the other hand, effective beam spots 17a, 17b, and 17c having a predetermined size are shown for each case of a, b, and c.

The control unit according to the present invention has a function of controlling the energy density of the shaping light beam to be uniform with respect to all irradiation positions on the shaping plane by minimizing the influence of shape and size distortion of the beam spot according to the irradiation position on the shaping plane of the shaping light beam .

Specifically, in order to make the energy density uniform for all the irradiation positions on the shaping plane of the shaping beam, the control unit controls the effective beam spot size as an area exceeding the shaping threshold power level for the shaping beam . As described above, since the intensity of the shaping light beam in the internal region of the effective beam spot is greater than the shaping threshold intensity, and no shaping occurs in the region corresponding to the outside of the effective beam spot in the beam spot internal region, It is important to adjust.

However, the size of the beam spot and the size of the effective beam spot will be in a mutual function relationship with additional parameters such as the specification (output, etc.) of the shaping beam, the path length of the shaping beam, and the incident angle to the shaping plane of the shaping beam Therefore, in the case where a relational expression or the like relating to such a mutual function is known, it is not necessary to control the size of the effective beam spot, but to exclude the application of the method of indirectly controlling the size of the effective beam spot by controlling the size of the beam spot Do not.

In addition, the control unit may adjust the effective beam spot size of the shaping light beam by adjusting the driving current magnitude of the shaping light source unit. This is because, when the size of the driving current is large, the output of the shaping light beam becomes large. When the output of the shaping light beam is large, the maximum value of the intensity of the shaping light beam is increased and the width of the shaping light beam in the intensity profile is increased.

In addition, in one embodiment of the control function of the control unit, as the distance from the center of the shaping plane increases with respect to each point of the shaping plane, the size of the effective beam spot of the shaping beam can be adjusted to be small. In this case, the relationship between the distance from the center of the shaping plane of each point and the size of the effective beam spot is not determined, but should be uniquely determined by considering specific parameters such as the specification of the shaping beam.

An embodiment of the control function of the control unit will be described with reference to FIGS. 10 and 11. The formative light unit of the present invention may have a function as shown in FIG. Also, the control unit of the present invention can perform the control function as shown in FIG. Specifically, with respect to the portion A shown in Fig. 11 (the center of the forming plane is relatively positioned and the incident angle with respect to the shaping plane of the shaping beam is relatively large), the size or shape of the beam spot (or effective beam spot) The drive current control is performed so that the size of the beam spot (or the effective beam spot) is relatively large since the distortion is small (i.e., the portion c in FIG. 10 is applied in association with the drive current) (Or an effective beam spot) is large, the influence of such a distortion is large, because the distortion of the beam spot (or the effective beam spot) is large with respect to the plane (Or the effective beam spot) so that the size of the beam spot (or the effective beam spot) is minimized so as to minimize the size of the beam spot (or the effective beam spot).

The shaping light source unit 15 functions to generate a shaping light beam and enter the first light guide unit 20 to be described later. The shaping beam is not limited to the types of light such as ultraviolet rays (UV lay) and laser, as long as it has energy required for curing the molding material used. However, when a laser is used, not only high energy can be focused but its output intensity and ON / OFF control are easy, so that it is suitable for use as a shaping beam, which is preferable. The output and wavelength of the laser should be determined corresponding to the molding material used. A laser diode (LD) or a device such as a VCSEL may be used for generating a laser. However, the present invention is not limited to this, and a single channel light beam is required as a shaping light beam, It is also possible to use a plurality of elements to create a laser array and then use a relay module or the like to focus and use the laser light. It is also conceivable to design a configuration for improving the quality of the shaping light beam or for miniaturizing the head device by applying optical elements such as various optical modulation modules or focusing lenses or prisms.

The first light guide portion 20 and the second light guide portion 30 are located on the space above the shaping plane 10 such that they are not parallel to one another, , The irradiating position of the shaping light beam is continuously determined with respect to time so that a missing part is not generated. The shaping light beam from the shaping light source section 15 is primarily reflected by the first light guide section 20 and is incident on the second light guide section 30, 10). In the present invention, at least one of the first light guide portion 20 and the second light guide portion 30 is a polygon mirror having a predetermined number of light reflection surfaces and rotating in a unidirection about a predetermined rotation axis mirror). The polygon mirror should be configured so that the shape of the cross section perpendicular to the rotation axis is polygonal, and the side surface is capable of reflecting shaped light rays. More preferably, adopting a polygon mirror having a regular cross-sectional shape is advantageous because it is easy to precisely control the rotation speed and the rotation direction of the polygon mirror. The cross section of the polygon mirror can be a square, a regular pentagon, a regular hexagon, a regular octagon, but is not limited thereto. As described later, since one line scan is performed by one side reflecting surface of the polygon mirror, the smaller the variable of the regular polygon of the section of the polygon mirror (for example, square), the length of the line scan However, since the rotation angular displacement of the polygon mirror needs to be larger in order to perform one line scan, there is a disadvantage that the rotation speed of the polygon mirror must be made larger in order to achieve the same shaping speed do. Therefore, it is necessary to select a suitable shape of the polygon mirror according to the size of the shaping plane 10 and to compromise these advantages and disadvantages. In addition, the reflecting surfaces of the side surfaces may be rectangular or trapezoids having the same shape and size. In this case, the overall shape of the polygon mirror can be a regular prism or a regular prism. The angle of rotation of the polygon mirror and the incidence angle of the shaping beam, the mutual position between the first and second light guide portions 20 and 30, or the size of the head device of the present invention, A prism or a regular prism. In the embodiment shown in Figs. 2 to 8, the first light guide portion 20 is formed in the shape of a prismatic prism, and the second light guide portion 30 is formed in the shape of a square prism.

The rotation axis of the polygon mirror can be installed at a predetermined position on the shaping plane 10 in various ways. In addition, the polygon mirror may need to be subjected to a reflection surface as well as a top surface or a bottom surface, which is related to the first optical sensor 41, and will be described later. The polygon mirror may be applied to both the first light guide portion 20 and the second light guide portion 30, but it is also applicable to only one of them.

The incidence direction of the shaping light incident from the shaping light source unit 15 is mostly fixed so that the first light guide unit 20 can receive the first light guide unit 20, The length in the direction of the rotation axis may be relatively short. On the other hand, it is considered that the second light guide part 30 is a structure for secondary reflection of the first-order reflected shaped light beam from the first light guide part 20, and the length in the direction of the rotation axis should be set relatively long.

The control unit 40 interlockingly controls the shaping light source unit 15, the first light guide unit 20 and the second light guide unit 30. The specific object to be controlled is the ON / OFF of the shaping light beam and the output value, Driving of the guide portion 20 and the second light guide portion 30, and the like. The irradiation position is specified with respect to the shaping plane 10 of the shaping beam in accordance with the rotation angle control of the first light guide portion 20 and the second light guide portion 30 and the shaping layer image information The shaping layer can be formed by controlling the on / off of the shaping beam. The control unit 40 includes a processing unit for generating an appropriate control signal for the control variable and a driving unit for processing the control signal generated in the processing unit and generating driving of the corresponding component. The processing unit can be implemented by hardware such as a circuit, or can be configured by software such as a program. The on-off control of the shaping beam may take the form of controlling the on / off of the shaping beam generating element -LD or VCSEL or the like, and may be configured to selectively pass or block the shaping beam generated by the shaping beam generating element over time But it is not limited to such a configuration, but may be implemented by controlling additional components such as a shutter or the like.

The control of the first light guide unit 20 and the second light guide unit 30 of the control unit 40 is performed by controlling the rotation of the polygon mirror and the main control parameters are the rotation angular velocity, It becomes an angular acceleration. It is necessary for these control variables to follow up with a small error within a small lead time with respect to the control signal of the control unit 40. For this purpose, it is preferable to use the electric control method. More preferably, it is possible to use an electric servo-motor capable of realizing the rotational angular velocity, the rotational angular displacement, and the rotational angular acceleration corresponding to a control signal (electric signal) varying with time, no.

The control unit 40 controls the driving of the polygon mirror constituting the first light guide unit 20 and the second light guide unit 30 as described above, Determines the start timing of each of a plurality of line scans in a direction parallel to the first axis (1) or the second axis (2), and determines the start timing of each of the shaping light source unit (15) And a first optical sensor 41 having a function of synchronizing driving of the guide unit 20 or the second light guide unit 30. [ An embodiment of the first optical sensor 41 applicable to the " 1-1 arrangement " to be described later is shown in Fig. The first polygon mirror 21 rotates in one direction to perform a line scan while the second polygon mirror 31 of the shaping beam reflected on the first polygon mirror 21 reflects the first polygon mirror 21, The incident point to the side surface (reflecting surface) is formed in the top-down direction. Immediately before one line scan is completed and a next line scan is started, the shaping light is reflected on the upper surface of the second polygon mirror 31, and the first light sensor (See Fig. 7 (a)). The synchronization control by the first optical sensor 41 is performed by the first light guide unit 20 and the shaping light source unit 20 15), in the configuration in which the second light guide portion 30 is an element responsible for line scanning (for example, the second-first arrangement), the synchronization control by the first photosensor 41 is performed by the second light The guide unit 30 and the shaping light source unit 15 will be targeted.

7B, the edge of the second light guide portion 30 (the second polygon mirror 31) is subjected to a tampering process so as to have an inclined surface having a predetermined inclination angle, and the shaping light reflected on the inclined surface is detected And FIG. However, since the second polygon mirror 31 is angularly displaced by a predetermined angle in the first-stage arrangement, in order to continuously detect the shaping light beam reflected on the tampering slope surface for each line scan, One optical sensor 41 should be arranged in a plurality of arrays as shown in Fig. 7 (b). The output signal of the first optical sensor 41 is transmitted to the processing unit to determine the start timing of the line scan and the start timing of the first light guide unit 20 and the first light guide unit 20 (The first polygon mirror 21) can be synchronized. Of course, the control unit 40 can perform the control through precisely controlling only the angular displacement of the first light guide unit 20 (the first polygon mirror 21), but it is possible to control the mechanical components such as the servo motor It is possible to obtain the effect of correcting such an error or the like through additional elements such as the first optical sensor 41 in consideration of the inherent process errors and response delays. Consequently, the first light guide portion 20 (first polygon mirror 21) and the shaping light portion 15 are generated after the control portion 40 processes including the generation signal of the first photosensor 41 The driving light of the first light guide part 20 and the driving light of the shaping light source 15 can be interlocked with each other.

The control unit 40 senses the shaped light beams incident on a predetermined point and detects a plurality of line scans in a direction parallel to the first axis 1 or the second axis 2 And a fourth optical sensor 44 having a function of synchronizing driving of the shaping light source unit 15 and the first light guide unit 20 or the second light guide unit 30, . 7 (c), a fourth optical sensor 44 is additionally provided at the lower end of the second light guide portion 30 (second polygon mirror 31) And the end timing of the end point " 1 " is determined.

The control unit 40 senses the shaped light beam incident on the predetermined position of the molding plane 10 to determine the initial start timing for the molding light irradiation on the molding plane 10, And a second optical sensor 42 having a function of synchronizing driving of the second light guide unit 30. A third optical sensor 43 having a function of detecting a shaped light beam incident on a predetermined position of the shaping plane 10 and determining a final end timing for shaping light irradiation on the shaping plane 10 is selected As shown in FIG. The initial start timing and the final end timing of scanning the entire one shaping plane 10 are set such that the distance between each line scan of the first light guide portion 20 or the second light guide portion 30 there is a direct relationship with the driving of the element responsible for stepping. 8 shows an embodiment of a second photosensor 42 and a third photosensor 43 that are installed for the " 1-1 arrangement ", wherein the irradiation of the shaping beam to the shaping plane 10 ) Is determined by the second photosensor (42) and the third photosensor (43). Here, since the second light guide portion 30 (the second polygon mirror 31) is an element responsible for the stepping of the line scan, the processing portion includes the second photosensor 42 and the third photosensor The second light guide unit 30 and the molding light source unit 15 are interlocked with each other by the driving signal of the second light guide unit 30 and the driving signal of the molding light source unit 15, . The synchronization control by the first photosensor 41 is performed by the second light guide unit 30 and the shaping light source unit 15 because the second light guide unit 30 is an element responsible for stepping, The synchronization control by the first optical sensor 41 is performed in the first optical guide portion (the second optical guide portion) in the configuration in which the first optical guide portion 20 is an element responsible for the separation 20 and the shaping light source unit 15.

The head device of the stereolithography equipment of the present invention includes a shaping light incident angle correcting section 50 having a function of causing the shaping light beam to be incident perpendicularly to the shaping plane 10 at all points forming the shaping plane 10 ). This is for uniformizing the shaping light output density as described above according to each incident point. The shaping light incident angle correcting section 50 in the embodiment shown in FIG. 9 is a lens installed on the upper side of the shaping plane 10, and has an incident angle of a molded light beam secondarily reflected from the second light guide section 30 Although it differs from one point to another, it functions to induce vertical incidence on the molding plane 10 through two refraction processes.

Hereinafter, implementation of a predetermined scanning pattern by arranging the above-described main components in space will be described. As an example of the scanning pattern on the shaping plane 10, it is possible to consider that a plurality of line scans are stepped by a predetermined distance from each other. Such a pattern may be an improvement in the scanning speed . Further, in the scanning pattern, the direction of the line scan and the direction of the stepping should be considered together with the incidence direction of the shaping light beam. Here, as the reference, the first axis 1, the second axis 2 and the third shaft 3 will be used.

The shaping light beam is incident on the first light guide portion 20 at a predetermined angle with the second axis 2 and the scanning pattern is scanned by a plurality of line scans May be a pattern formed by stepping a predetermined distance in the direction of the first axis (1). (Hereinafter, referred to as a first scanning pattern) FIGS. 3 and 6 show an embodiment of the first scanning pattern.

The shaping light beam is incident on the first light guide portion 20 at a predetermined angle with the second axis 2,

The scanning pattern may be a pattern in which a plurality of line scans each having a direction parallel to the first axis 1 are stepped in the direction of the second axis 2 by a predetermined distance. Hereinafter, the second scanning pattern will be referred to as a second scanning pattern.) Such patterns are shown in Figs. 4 to 5 as one embodiment.

The shaping light beams in the first scanning pattern and the second scanning pattern can be incident in parallel with the second axis 2 and can be arranged so as not to be included in the plane formed by the second axis 2 and the third axis 3 Or may be incident in the direction of The incidence direction of the shaping light beam can be determined in relation to the installation positions of the first light guide portion 20 and the second light guide portion 30. [

Hereinafter, in order to implement the first scanning pattern and the second scanning pattern, the spatial arrangement of major components such as the first light guide section 20, the second light guide section 30, and the shaping light source section 15 We will propose. Such a proposal is for realizing the required function using a minimum number of components, so that it is possible to use a reflector, prism, or other optical element to change or modify a part of the arrangement to make it more complicated, It can be said that they are in the same or equal range.

To implement the first scanning pattern, the head device of the stereolithography equipment of the present invention proposes two component configurations.

The first light guide unit 20 includes a first polygon mirror 21 and a first polygon mirror 21 is disposed between the first axis 1 and the second axis 1, The second polygon mirror 31 is provided with the third polygon mirror 31 as a rotation center axis and the second light guide unit 30 is provided with the third polygon mirror 31 as the third A plurality of line scans in a direction parallel to the second axis 2 are provided with a fifth axis 5 parallel to the axis 3 as a rotation center axis, And stepping by a predetermined distance in the direction of the first axis 1 is performed by rotating the second polygon mirror 31. [ As for the stepping interval, if the value is too small, it is inefficient because the patterning light is irradiated again on the area where the curing has already proceeded by line scanning, and if the value is too large, the molding light is not irradiated Should be taken into consideration. As described above, since one line scan is performed by one side slope of the first polygon mirror 21 in which the incidence angle of the shaping light is continuously changed while rotating, the first polygon mirror 21 is rotated in one direction The control while the shaping light beam is passed from one side surface to another adjacent side surface is controlled by turning off the output of the shaping light source or by using additional components such as a shutter, A method of using a shielding film provided near the shaping plane, or a method of lowering the output of the shaping beam to such an extent that the shaping material does not harden or sinter even if the shaping beam enters the shaping plane Can be considered. One embodiment of such a configuration is shown in FIG.

Further, when the first polygon mirror 21 alternately rotates in the forward direction and the reverse direction, only one side slope of the first polygon mirror 21 is used in all line scans. One embodiment of such a configuration is shown in FIG. 9, but such a configuration is not desirable. This will be described later.

Next, for the 1-2 configuration, one embodiment of such a configuration is shown in Fig. The first light guide portion 20 includes a seventh polygon mirror 24 and the seventh polygon mirror 24 is arranged on the tenth axis 10x parallel to the third axis 3 as a rotation center axis And the second light guide unit 30 includes an eighth polygon mirror 34. The eighth polygon mirror 34 is disposed on an eleventh axis 11x parallel to the first axis 1 A plurality of line scans in a direction parallel to the second axis 2 are formed by rotating the eighth polygon mirror 34, Stepping by a predetermined distance in the direction is performed by rotating the seventh polygon mirror 24. As described above, one line scan is performed by one side slope of the eighth polygon mirror 34 in which the incidence angle of the shaping light is continuously changed while rotating, and the eighth polygon mirror 34 is moved in one direction The control while the shaping light beam is passed from one side slope surface to another adjacent side slope surface can be controlled by turning off the output of the shaping light source portion or by using additional components such as a shutter, A method of using a shielding film provided near the shaping plane, or a method of lowering the output of the shaping beam to such an extent that the shaping material does not harden or sinter even if the shaping beam enters the shaping plane Can be considered. Further, when the seventh polygon mirror 24 alternately rotates in the forward and reverse directions, only one side slope of the seventh polygon mirror 24 is used in all line scans.

To implement the second scanning pattern, the head assembly of the stereolithography equipment of the present invention proposes two component configurations.

First, with respect to the " 2-1 batch ", one embodiment of such a configuration is shown in FIG. The first optical guide part 20 includes a third polygon mirror 22 and the third polygon mirror 22 has a sixth axis 6 parallel to the first axis 1 as a rotation center axis And the second light guide portion 30 includes a fourth polygon mirror 32 and the fourth polygon mirror 32 is disposed on the seventh axis 7 parallel to the third axis 3 And a line scan in a direction parallel to the first axis 1 is performed by rotating the fourth polygon mirror 32 and the line scan in the second axis 2 direction Stepping by a predetermined interval causes the third polygon mirror 22 to be rotated. One line scan is performed by one of the side reflection slopes of the fourth polygon mirror 32 in which the incidence angle of the shaping light is continuously changed while rotating so that the fourth polygon mirror 32 continues to rotate in one direction Control during the shaping beam from one side surface to another adjacent side surface may be accomplished by turning off the output of the shaping light source or by blocking the shaping beam using additional components such as a shutter, A method using a shielding film provided near a shaping plane, or a method of lowering the output of shaping beam to such an extent that the shaping material does not harden or sinter even if the shaping beam enters the shaping plane . The stepping of each line scan in the direction of the second axis 2 causes the third polygon mirror 22 to rotate by a predetermined angular displacement so that the fourth polygon mirror 32 As the reflection position of the shaping light beam on the side reflection surface of the light guide plate is stepped. Further, in the case of causing the fourth polygon mirror 32 to rotate alternately in forward and reverse directions, only one side slope of the fourth polygon mirror 32 is used in all line scans. , This configuration is not desirable, as will be described below).

Next, with respect to the " 2-2 arrangement ", one embodiment of such a configuration is shown in Fig. The first light guide portion 20 includes a fifth polygon mirror 23 and the fifth polygon mirror 23 has an eighth axis 8 forming a predetermined angle with the third axis 3 And the second light guide portion 30 includes a sixth polygon mirror 33 and the sixth polygon mirror 33 is disposed as a rotation center axis and the sixth polygon mirror 33 is disposed at the ninth A plurality of line scans in a direction parallel to the first axis 1 are established by rotating the fifth polygon mirror 23 while the second scan line 3 is provided by rotating the second polygon mirror 23, Stepping by a predetermined distance in the direction of the axis 2 is performed by rotating the sixth polygon mirror 33. One line scan is performed by one side slope of the fifth polygon mirror 23 in which the incidence angle of the shaping light beam is continuously changed while rotating so that the fifth polygon mirror 23 continues to rotate in one direction Control is performed while the shaping light beam is passed from one side surface of the fifth polygon mirror 23 to another side surface of the adjacent side mirror surface so that the output of the shaping light portion is turned off or the output of the additional component such as a shutter Or a method of using a shielding film provided near the shaping plane or the like may be applied to the case where the shaping light beam is incident on the shaping plane or the output of the shaping light beam may be used until the hardening or sintering action of the shaping material does not occur And the like. The stepping of each line scan in the direction of the second axis 2 is performed such that the reflection position of the shaping light beam is different from the position of the sixth polygon mirror 33 stepping. In addition, when the fifth polygon mirror 23 is caused to alternately rotate in forward and reverse directions, only one side slope of the fifth polygon mirror 23 is used in all line scans.

Hereinafter, a method of scanning the shaping plane 10 using the head device of the stereolithography equipment according to the present invention will be described. For this purpose, it is assumed that the above-described molding plane 10 is actually supplied with the molding material. Once scanning of the shaping beam is completed with respect to one shaping plane 10, one shaping layer is formed, and these shaping layers are stacked to form a three-dimensional sphere. In the scanning of the shaping plane 10, it is preferable that scanning should be performed through an optimal path that minimizes the time required for scanning, and there should not be a portion where the shaping beam is not irradiated.

First, a method of scanning the shaping plane 10 using the head device of the stereolithography equipment having the " 1-1 arrangement " will be described. First, the first polygon mirror 21 rotates in one direction, and the shaping light source unit 15 starts to enter the shaping light beam into the first polygon mirror 21. Secondly, while the first polygon mirror 21 continues to rotate at a predetermined speed, the shaped light rays that are first reflected on the first polygon mirror 21 are secondly reflected by the second polygon mirror 31, A line scan is performed in a direction parallel to the second axis 2 with respect to the first axis 10. Third, the shaping beam 11 is controlled not to be irradiated on the shaping plane 10, and the line scan in the second stage is completed. The control at this time may be applied to the use of additional components such as the output off of the shaping light source, a shutter, or the use of a shielding film provided near the shaping plane. Even if the shaping light is incident on the shaping plane A method of lowering the output of molding light to such an extent that hardening or sintering action of the molding material does not occur can be considered. Fourth, in order to perform a next line scan after a predetermined interval in the direction of the first axis 1 following a line scan in the second stage, a second polygon mirror 31 are rotated by a predetermined angular displacement and the first polygon mirror 21 continues to rotate in the same direction until the rear reflection surface adjacent to the immediately preceding reflection surface reaches a predetermined position. At this time, if the rotation of the second polygon mirror 31 and the rotation of the first polygon mirror 21 are simultaneously performed, the total molding time can be reduced. Fifth, the first to fourth steps are repeatedly performed until irradiation of the shaping beam is completed on the entire surface of the shaping plane 10. In this method, the first polygon mirror 21 preferably rotates only in a predetermined unidirectional direction. If the first polygon mirror 21 is rotated only in this one direction, the time required between one line scan and the next line scan can be minimized, and the time required for accelerating the first polygon mirror 21 from the stop state Since the time can also be minimized, the overall molding time can be reduced. Of course, the first polygon mirror 21 may be configured to alternately rotate in the forward and reverse directions as shown in FIG. 9, but under such a configuration, the first polygon mirror 21 is rotated in the forward rotation- The time required per line scan is increased while repeating the process of stopping, thereby reducing the benefit of applying the present invention. It should also be noted that not only the electric motor element for driving the first polygon mirror 21 becomes complicated but also vibration and noise are more likely to occur in the course of repeating the above process. In the case of the second polygon mirror 31, it is also apparent that it is necessary to continue to rotate in a single direction within the process of performing the irradiation with respect to one molding plane 10. However, when the next shaping plane 10 is irradiated after completing the irradiation with respect to one shaping plane 10, it may be rotated in the same direction as the rotational direction in the previous shaping plane 10 irradiation process , It may be rotated in the opposite direction. This is because, in the case of the second polygon mirror 31, the same problem as in the first polygon mirror 21 is not generated because the second polygon mirror 31 must be in a stopped state during the line scan. However, in the latter case, the second polygon mirror 31 does not necessarily have to be a polygon mirror.

First, a method of scanning a shaping plane 10 using a head device of a stereolithography equipment having a '1-2 arrangement' will be described. This is illustrated in Fig. 6 as an embodiment of the procedure. First, the eighth polygon mirror 34 rotates in one direction, and the shaping light source unit 15 starts to enter the shaping light beam into the seventh polygon mirror 24. Secondly, while the eighth polygon mirror 34 continues to rotate at a predetermined speed, the shaped beam reflected firstly on the seventh polygon mirror 24 is secondly reflected by the eighth polygon mirror 34, A line scan is performed in a direction parallel to the second axis 2 with respect to the first axis 10. Third, the shaping beam 11 is controlled not to be irradiated on the shaping plane 10, and the line scan in the second stage is completed. The control at this time may be applied to the use of additional components such as the output off of the shaping light source, a shutter, or the use of a shielding film provided near the shaping plane. Even if the shaping light is incident on the shaping plane A method of lowering the output of molding light to such an extent that hardening or sintering action of the molding material does not occur can be considered. Fourth, in order to perform a next line scan after a predetermined interval in the direction of the first axis 1 following the line scan in the second stage, a seventh polygon mirror 24 are rotated by a predetermined angular displacement, and the eighth polygon mirror 34 continues to rotate in the same direction until the rear reflection surface adjacent to the immediately preceding reflection surface reaches a predetermined position. At this time, if the rotation of the eighth polygon mirror 34 and the rotation of the seventh polygon mirror 24 are simultaneously performed, the total molding time can be reduced. Fifth, the first to fourth steps are repeatedly performed until irradiation of the shaping beam is completed on the entire surface of the shaping plane 10. In this method, the eighth polygon mirror 34 preferably rotates only in a predetermined unidirectional direction. If the eighth polygon mirror 34 is rotated in only one direction in this way, the time required between one line scan and the next line scan can be minimized, and the time required for accelerating the eighth polygon mirror 34 from the stop state Since the time can also be minimized, the overall molding time can be reduced. Of course, the eighth polygon mirror 34 may be configured to alternately rotate in the forward and reverse directions. However, in this configuration, the eighth polygon mirror 34 repeats the forward rotation-stop-reverse rotation- The time required per scan is increased, and the benefit of applying the present invention is reduced. Further, it should be considered that not only the electric motor element for driving the eighth polygon mirror 34 is further complicated, but also vibration and noise are more likely to occur in the course of repeating the above process. In the case of the seventh polygon mirror 24, it is also apparent that in the process of performing the irradiation with respect to one molding plane 10, it is necessary to continue to rotate in a single direction. However, when the next shaping plane 10 is irradiated after completing the irradiation with respect to one shaping plane 10, it may be rotated in the same direction as the rotational direction in the previous shaping plane 10 irradiation process , It may be rotated in the opposite direction. This is because, in the case of the seventh polygon mirror 24, there is no problem as in the eighth polygon mirror 34 since it must be in a stopped state during the line scan. However, in the latter case, the seventh polygon mirror 24 does not necessarily have to be formed of a polygon mirror.

Next, a method of scanning the shaping plane 10 using the head device of the stereolithography equipment having the 2-1 arrangement will be described. First, the fourth polygon mirror 32 rotates in one direction, and the shaping light source unit 15 starts to introduce the shaping light into the third polygon mirror 22. [ Secondly, while the fourth polygon mirror 32 continues to rotate at a predetermined speed, the shaped light beam reflected first to the third polygon mirror 22 is secondly reflected by the fourth polygon mirror 32, A line scan is performed in a direction parallel to the first axis 1 with respect to the first axis 10. Third, the shaping beam 11 is controlled not to be irradiated on the shaping plane 10, and the line scan in the second stage is completed. The control at this time may be applied to the use of additional components such as the output off of the shaping light source, a shutter, or the use of a shielding film provided near the shaping plane. Even if the shaping light is incident on the shaping plane A method of lowering the output of molding light to such an extent that hardening or sintering action of the molding material does not occur can be considered. Fourth, in order to perform a next line scan in a state of being stepped by a predetermined interval in the direction of the second axis 2 following the line scan in the second stage, The second polygon mirror 22 rotates by a predetermined angular displacement and the fourth polygon mirror 32 continues to rotate in the same direction until the rear reflection surface adjacent to the immediately preceding reflection surface reaches a predetermined position. At this time, if the rotation of the third polygon mirror 22 and the rotation of the fourth polygon mirror 32 are simultaneously performed, the entire molding time can be reduced. Fifth, the first to fourth steps are repeatedly performed until the irradiation of the shaping beam is completed with respect to the entire surface of the molding plane 10. In this method, it is preferable that the fourth polygon mirror 32 be rotated only in a predetermined unidirectional direction. In the process of irradiating the third polygon mirror 22 with respect to one shaping plane 10, But when the irradiation of the next shaping plane 10 is started, it is possible to start the rotation in the same direction as the rotation direction in the irradiation with respect to the previous shaping plane 10, or to rotate in the other direction. In the latter case, the third polygon mirror 22 does not necessarily have to be composed of a mirror of polygon type.

Next, a method of scanning the shaping plane 10 using the head device of the stereolithography equipment having the second-second arrangement will be described. First, the fifth polygon mirror 23 rotates in one direction, and the shaping light source unit 15 starts to project the shaping light to the fifth polygon mirror 23. [ Secondly, while the fifth polygon mirror 23 continues to rotate at a predetermined speed, the shaped light beam first reflected on the fifth polygon mirror 23 is secondly reflected by the sixth polygon mirror 33, A line scan is performed in a direction parallel to the first axis 1 with respect to the first axis 10. Third, the shaping beam 11 is controlled not to be irradiated on the shaping plane 10, and the line scan in the second stage is completed. The control at this time may be applied to the use of additional components such as the output off of the shaping light source, a shutter, or the use of a shielding film provided near the shaping plane. Even if the shaping light is incident on the shaping plane A method of lowering the output of molding light to such an extent that hardening or sintering action of the molding material does not occur can be considered. Fourth, in order to perform the next line scan in a state of being stepped by a predetermined interval in the direction of the second axis 2 following the line scan in the second stage, The first polygon mirror 33 rotates by a predetermined angular displacement and the fifth polygon mirror 23 continues to rotate in the same direction until the rear reflection surface adjacent to the immediately preceding reflection surface reaches a predetermined position. At this time, if the rotation of the fifth polygon mirror 23 and the rotation of the sixth polygon mirror 33 are simultaneously performed, the total molding time can be reduced. Fifth, the first to fourth steps are repeatedly performed until the irradiation of the shaping beam is completed with respect to the entire surface of the molding plane 10. In this method, it is preferable to rotate the fifth polygon mirror 23 only in a predetermined unidirectional direction, and in the process of irradiating the sixth polygon mirror 33 to one shaping plane 10, But when the irradiation of the next shaping plane 10 is started, it is possible to start the rotation in the same direction as the rotation direction in the irradiation with respect to the previous shaping plane 10, or to rotate in the other direction. In the latter case, the sixth polygon mirror 33 does not necessarily have to be formed of a polygonal mirror.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it should be understood that various changes and modifications will be apparent to those skilled in the art. It is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the scope of protection of the present invention should be construed according to the following claims, and all technical ideas which fall within the scope of equivalence by alteration, substitution, substitution, Range. In addition, it should be clarified that some configurations of the drawings are intended to explain the configuration more clearly and are provided in an exaggerated or reduced size than the actual configuration.

1: 1st axis
2: 2nd axis
3: Third axis
4: fourth axis
5: fifth axis
6: 6th axis
7: Seventh axis
8: 8th axis
9: 9th axis
10x: 10th axis
11x: Axis 11
10: Molding plane
11: plastic beam
12: Line scan
15: Molded light source
16x, 16a, 16b, 16c: intensity profile of shaped light beam
17a, 17b, 17c: Effective beam spot size of shaped light beam
20: first light guide portion
21: first polygon mirror
22: Third polygon mirror
23: fifth polygon mirror
24: seventh polygon mirror
30: second light guide portion
31: second polygon mirror
32: fourth polygon mirror
33: sixth polygon mirror
34: 8th polygon mirror
40:
41: first optical sensor
42: second optical sensor
43: Third optical sensor
44: fourth optical sensor

Claims (32)

A three-dimensional object (1) for projecting molding light in a predetermined scanning pattern over an entire surface of a molding plane (10) including a first axis (1) and a second axis (2) perpendicular to the third axis A head device of a molding machine,
A shaping light source unit (15) for generating the shaping light beam;
And a function of firstly reflecting the shaped light beam from the shaping light source part (15) and making the light incident on the second light guide part (30) at a predetermined position above the shaping plane (10) A first light guide part 20 including a number of light reflection surfaces and including a polygon mirror rotating in a unidirection about a predetermined rotation axis;
And a function of secondarily reflecting the shaped light beam incident on the rotor in the first light guide part (20) and making the light incident on the molding plane (10) at a predetermined position above the molding plane (10) A second light guide portion 30 having a predetermined number of light reflection surfaces and including a polygon mirror rotating in a unidirectional center around a predetermined rotation axis;
A control unit 40 for controlling the driving of the shaping light beam, the driving of the first light guide unit 20 and the driving of the second light guide unit 30;
, ≪ / RTI >
Wherein the shaping light source unit has a variable output fluorescent light source capable of adjusting a driving output,
The control unit minimizes the influence of shape and size distortion of the beam spot according to the irradiation position on the shaping plane of the shaping beam to control the energy density of the shaping beam to be uniform with respect to all irradiation positions on the shaping plane A head device for a stereolithography equipment having a function of controlling an energy density of a molding beam.
The method according to claim 1,
The control for uniforming the energy density of all the irradiation positions on the shaping plane of the shaping beam by the control unit includes a step of obtaining an effective beam spot size as an area exceeding the shaping critical intensity level with respect to the shaping beam, Wherein the energy density of the shaping beam is controlled by controlling the energy density of the shaping beam.
The method according to claim 1,
The control for making the energy density uniform for all the irradiation positions on the shaping plane of the shaping beam by the control unit includes controlling the size of the beam spot as a region where the shaping beam intersects the shaping plane The apparatus of claim 1, wherein the energy density of the shaping beam is controlled by the energy density of the shaping beam.

The method of claim 2,
Wherein the adjustment of the effective beam spot size of the shaping beam by the control unit is performed by adjusting a magnitude of a driving current of the shaping beam unit.
The method of claim 2,
Wherein the controller controls the size of the effective beam spot of the shaping beam to be smaller as the distance from the center of the shaping plane increases with respect to each point of the shaping plane. The head device comprising:

The method according to claim 1,
The control unit 40 senses the shaped light beams incident on a predetermined point and detects the start of each of a plurality of line scans in a direction parallel to the first axis 1 or the second axis 2 Further includes a first photosensor (41) having a function of determining timing and synchronizing driving of the shaping light source unit (15) and the first light guide unit (20) or the second light guide unit (30) Wherein the energy density of the shaping light beam is adjusted by adjusting the energy density of the shaping beam.
The method of claim 6,
The control unit 40 senses the shaping light beams incident on a predetermined point and detects the end of each of a plurality of line scans in a direction parallel to the first axis 1 or the second axis 2 Further includes a fourth photosensor (44) having a function of determining the timing and synchronizing driving of the shaping light source unit (15) and the first light guide unit (20) or the second light guide unit (30) Wherein the energy density of the shaping light beam is adjusted by adjusting the energy density of the shaping beam.
The method according to claim 1,
The control unit 40 senses the shaped light beam incident on the predetermined position of the molding plane 10 to determine the initial start timing for the molding light irradiation to the molding plane 10, And a second photosensor (42) having a function of synchronizing driving of the first light guide part (20) or the second light guide part (30) Head device for stereolithography equipment with adjustability.
The method of claim 8,
The control unit 40 may include a function of sensing a shaping light incident on a predetermined position of the shaping plane 10 and determining a final termination timing for shaping light irradiation on the shaping plane 10, Further comprising an optical sensor (43) for adjusting the energy density of the shaped light beam.
The method according to claim 1,
The shaping light beam is incident on the first light guide part 20 at a predetermined angle with the second axis 2,
The scanning pattern is a pattern in which a plurality of line scans each having a direction parallel to the second axis 2 are stepped by a predetermined distance in the direction of the first axis 1 A head device for a stereolithography device having a function of controlling the energy density of a shaped beam.

The method of claim 10,
The first optical guide part 20 includes a first polygon mirror 21 and the first polygon mirror 21 rotates a fourth axis 4 parallel to the first axis 1 And is installed as a central axis,
The second light guide portion 30 includes a second polygon mirror 31 and the second polygon mirror 31 is disposed on the fifth axis 5 parallel to the third axis 3 And as a rotation center shaft,
A plurality of line scans in a direction parallel to the second axis 2 are formed by rotating the first polygon mirror 21 and a predetermined interval in the first axis 1 direction And the stepping is performed by rotating the second polygon mirror (31). A head device for a stereolithography equipment having a function of regulating an energy density of shaped light rays.


A method of scanning a shaping plane (10) using the head device of the stereolithography equipment of claim 11,
(i) the first polygon mirror 21 is rotated in one direction, and the shaping light source unit 15 starts to enter the shaping light into the first polygon mirror 21 (s10);
(ii) While the first polygon mirror 21 continues to rotate at a predetermined speed, the molded light beam primarily reflected on the first polygon mirror 21 is reflected by the second polygon mirror 31 in the second polygon mirror 31, A step (s20) of performing a line scan in a direction parallel to the second axis (2) with respect to the shaping plane (10);
(iii) a step (s30) in which the line scan in the step (ii) is terminated by being controlled not to irradiate the shaping light beam (11) on the shaping plane (10);
(iv) a line scan in step (ii) is followed by a predetermined interval in the direction of the first axis (1) and then a next line scan is performed, The second polygon mirror 31 is rotated by a predetermined angular displacement and the first polygon mirror 21 continues to rotate in the same direction until the rear reflection surface adjacent to the immediately preceding reflection surface reaches a predetermined position s40);
(v) repeating the steps (i) to (iv) until the irradiation of the shaping beam is completed with respect to the entire surface of the shaping plane (10);
, ≪ / RTI >
Characterized in that the first polygon mirror (21) rotates only in a predetermined unidirectional direction.
The method of claim 12,
After step (v), the second polygon mirror 31 further includes a step (s55) of preparing the rotation in the same direction as the rotation direction in the step (v) Scanning method.
The method of claim 12,
After step (v), the second polygon mirror 31 further includes a step (s55) of preparing the rotation in the direction opposite to the rotation direction in the step (v) Scanning method.
The method of claim 12,
Wherein the rotation of the second polygon mirror (31) and the rotation of the first polygon mirror (21) in the step (iv) are simultaneously performed.
The method according to claim 1,
The shaping light beam is incident on the first light guide part 20 at a predetermined angle with the second axis 2,
The scanning pattern is a pattern in which a plurality of line scans each having a direction parallel to the first axis 1 are stepped by a predetermined distance in the direction of the second axis 2 A head device for a stereolithography device having a function of controlling the energy density of a shaped beam.



18. The method of claim 16,
The first light guide part 20 includes a third polygon mirror 22 and the third polygon mirror 22 rotates a sixth axis 6 parallel to the first axis 1 And is installed as a central axis,
The second light guide unit 30 includes a fourth polygon mirror 32 and the fourth polygon mirror 32 is disposed on the third axis 3 parallel to the seventh axis 7 parallel to the third axis 3 And as a rotation center shaft,
A line scan in a direction parallel to the first axis 1 is performed by rotating the fourth polygon mirror 32 and is spaced a predetermined distance in the direction of the second axis 2 wherein stepping is performed by rotating the third polygon mirror (22). A head device for a stereolithography equipment having a function of regulating an energy density of shaped light rays.
A method of scanning a shaping plane (10) using the head device of the stereolithography equipment of claim 17,
(i) the fourth polygon mirror 32 is rotated in one direction, and the shaping light source unit 15 starts to enter the shaping light into the third polygon mirror 22 (S100);
(ii) While the fourth polygon mirror 32 continues to rotate at a predetermined speed, the shaped light beams that are first reflected on the third polygon mirror 22 are reflected by the fourth polygon mirror 32 in the second reflection (S200) in a direction parallel to the first axis (1) with respect to the shaping plane (10) after step (s200);
(iii) finishing a line scan in the step (ii) by controlling the shaping light beam (11) so as not to be irradiated on the shaping plane (10);
(iv) a step of performing a next line scan in a state of being stepped by a predetermined interval in the direction of the second axis 2 following the line scan in the step (ii) , The third polygon mirror (22) is rotated by a predetermined angular displacement, and the fourth polygon mirror (32) continues to rotate in the same direction until the rear reflection surface adjacent to the immediately preceding reflection surface comes to a predetermined position (S400);
(v) repeating the steps (i) to (iv) until the irradiation of the shaping beam is completed with respect to the entire surface of the shaping plane 10 (s500);
, ≪ / RTI >
Characterized in that the fourth polygon mirror (32) rotates only in a predetermined unidirectional direction.


19. The method of claim 18,
After step (v), the third polygon mirror 22 further includes preparing (S550) a rotation in the same direction as the rotation direction in the step (v) Scanning method.

19. The method of claim 18,
After step (v), the third polygon mirror 22 further includes a step (s550) of preparing the rotation in a direction opposite to the rotation direction in the step (v) Scanning method.

19. The method of claim 18,
Wherein the rotation of the third polygon mirror (22) and the rotation of the fourth polygon mirror (32) in the step (iv) are simultaneously performed.

18. The method of claim 16,
The first light guide unit 20 includes a fifth polygon mirror 23 and the fifth polygon mirror 23 is disposed on an eighth axis which is at a predetermined angle with the third axis 3 8 as a rotation center axis,
The second light guide unit 30 includes a sixth polygon mirror 33 and the sixth polygon mirror 33 is disposed on the ninth axis 9 parallel to the first axis 1 And as a rotation center shaft,
A plurality of line scans in a direction parallel to the first axis 1 are performed by rotating the fifth polygon mirror 23 and a predetermined interval in the second axis 2 direction Wherein the sixth polygon mirror (33) is rotated by rotating the sixth polygon mirror (33).

A method of scanning a shaping plane (10) using the head device of the stereolithography equipment of claim 22,
(i) the fifth polygon mirror 23 is rotated in one direction, and the shaping light source unit 15 starts to enter the shaping light into the fifth polygon mirror 23 (s1000);
(ii) while the fifth polygon mirror 23 continues to rotate at a predetermined speed, the shaped light beam first reflected on the fifth polygon mirror 23 is reflected on the sixth polygon mirror 33 by the second reflection A step (s2000) of performing a line scan with respect to the shaping plane (10) in a direction parallel to the first axis (1);
(iii) a step (s3000) in which the line scan in the step (ii) is terminated by being controlled so that the molding light beam 11 is not irradiated on the shaping plane 10;
(iv) a step of performing a next line scan in a state of being stepped by a predetermined interval in the direction of the second axis 2 following the line scan in the step (ii) , The sixth polygon mirror (33) is rotated by a predetermined angular displacement, and the fifth polygon mirror (23) continues to rotate in the same direction until the rear reflection surface adjacent to the immediately preceding reflection surface comes to a predetermined position (S4000);
(v) repeating the steps (i) to (iv) until the irradiation of the shaping beam is completed on the entire surface of the shaping plane 10 (s5000);
, ≪ / RTI >
Wherein the fifth polygon mirror (23) rotates only in a predetermined unidirectional direction.

24. The method of claim 23,
After step (v), the sixth polygon mirror 33 further includes a step (s5500) of preparing the rotation in the same direction as the rotation direction in the step (v) Scanning method.

24. The method of claim 23,
After step (v), the sixth polygon mirror 33 further includes a step (s5500) of preparing the rotation in the direction opposite to the rotation direction in the step (v) Scanning method.

24. The method of claim 23,
Wherein the rotation of the fifth polygon mirror (23) and the rotation of the sixth polygon mirror (33) in the step (iv) are simultaneously performed.

The method of claim 10,
The first optical guide part 20 includes a seventh polygon mirror 24 and the seventh polygon mirror 24 rotates a tenth axis 10x parallel to the third axis 3 And is installed as a central axis,
The second light guide unit 30 includes an eighth polygon mirror 34 and the eighth polygon mirror 34 has an eleventh axis 11x parallel to the first axis 1 And as a rotation center shaft,
A plurality of line scans in a direction parallel to the second axis 2 are formed by rotating the eighth polygon mirror 34 and are arranged at a predetermined interval in the first axis 1 direction And the stepping is performed by rotating the seventh polygon mirror (24). A head device for a stereolithography equipment having a function of regulating an energy density of shaped light rays.

27. A method of scanning a shaping plane using the head device of the stereolithography equipment of claim 27,
(i) a step (s10000) in which the eighth polygon mirror 34 rotates in one direction, and the shaping light source unit 15 starts to introduce shaping light into the seventh polygon mirror 24;
(ii) While the eighth polygon mirror (34) continues to rotate at a predetermined speed, the shaping light first reflected on the seventh polygon mirror (24) is reflected by the eighth polygon mirror (34) A step (s20000) of performing a line scan in a direction parallel to the second axis (2) with respect to the shaping plane (10);
(iii) a step (s30000) in which the line scan in the step (ii) is finished is controlled such that the molding light beam 11 is not irradiated on the shaping plane 10;
(iv) a line scan in step (ii) is followed by a predetermined interval in the direction of the first axis (1) and then a next line scan is performed, The seventh polygon mirror 24 is rotated by a predetermined angular displacement and the eighth polygon mirror 34 continues to rotate in the same direction until a rear reflection surface adjacent to the immediately preceding reflection surface reaches a predetermined position s40000);
(v) repeating the steps (i) to (iv) until the irradiation of the shaping beam is completed with respect to the entire surface of the shaping plane 10 (s50000);
, ≪ / RTI >
Wherein the eighth polygon mirror (34) rotates only in a predetermined unidirectional direction.

29. The method of claim 28,
After step (v), the seventh polygon mirror 24 further includes preparing (s55000) a rotation in the same direction as the rotation direction in the step (v) Scanning method.

29. The method of claim 28,
After step (v), the seventh polygon mirror 24 further includes preparing (s55000) a rotation in a direction opposite to the rotation direction in the step (v) Scanning method.
29. The method of claim 28,
Wherein rotation of the seventh polygon mirror (24) and rotation of the eighth polygon mirror (34) in the step (iv) are simultaneously performed.
A stereolithography apparatus for forming a stereolithography product by forming a molding layer by supplying molding material and laminating the same,
The stereolithography apparatus according to any one of claims 1 to 11, 16, 17, 22, and 27, wherein the irradiation of the shaping beam is performed using the head device.

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